1. From the Center for Vascular and Inflammatory Disease (S.C.M., S.B., B.H., M.M., I.M., D.K.S.), Departments of Physiology (S.C.M., L.C., I.M., D.K.S.), Surgery (S.B., B.H., M.M., D.K.S.), Pathology (T.C.), and Medicine (L.C.), University of Maryland School of Medicine, Baltimore, MD.